JP6495540B2 - E911 positioning via background signal tracking - Google Patents

Description

Related applications

  This PCT application is a non-provisional US patent application Ser. No. 14/848 entitled “E911 POSITIONING VIA BACKGROUND SIGNAL TRACKING” filed on Sep. 8, 2015, which is incorporated herein by reference in its entirety. , Claim priority to No. 135 and its benefits.

1. Field
[0001] The present disclosure relates generally to mobile communication device position or location estimation, and more specifically to improved E911 positioning via background signal tracking for use in or with a mobile communication device. .

2. Information
[0002] Mobile communication devices, such as cellular phones, portable navigation units, laptop computers, personal digital assistants, or the like, are becoming increasingly common day by day. For example, certain mobile communication devices, such as location-aware cellular phones, smartphones, or the like, provide positioning assistance parameters obtained or collected from various systems May assist users in estimating their geographic location. For example, in an outdoor environment, a particular mobile communication device may be connected to a global positioning system (GPS) or other similar global navigation satellite system (GNSS) via a cellular telephone or other wireless or electronic communication network. Estimate their geographical location or so-called “position fix” by capturing wireless signals from satellite positioning systems (SPS), cellular base stations, etc. ) Can get. The captured wireless signal may be processed, for example, by or at the mobile communication device, the location of which is Advanced Forward Link Trilateration (AFLT), Base Station Identification, Cell Tower Triangle Survey , Or the like, and can be estimated using known techniques.

  [0003] In environments such as indoor or urban building canyons, for example, mobile communication devices reliably receive satellites or similar wireless signals to facilitate or support one or more location estimation techniques. Or it may not be captured. For example, signals from SPS or other wireless transmitters may be attenuated or otherwise affected in some way (eg, insufficient, weak, fragmented, etc.) , May at least partially prevent them from being used for position estimation. Sometimes a mobile communication device may obtain a position fix by measuring a range with three or more terrestrial wireless transmitter devices, such as a cellular base station, access point, etc., located at a known location . The range is one of the received signals such as, for example, obtaining a medium access control identifier (MAC ID) address from a wireless signal received from a suitable access point, and signal strength, round trip delay, or the like. It can be measured by measuring the above characteristics.

  [0004] In some cases, a location fix for a mobile communication device may be obtained in connection with an observed time difference of arrival (OTDOA) technique. In this technique, a mobile communication device can measure a timing difference between reference signals received from two or more pairs of cellular base stations, for example, at a known location and transmission timing for that measured base station. A position fix may be obtained based at least in part. OTDOA positioning techniques can be used to assist in the localization of mobile communication devices, for example, during emergency calls in accordance with the Emergency 911 (E911) command from the Federal Communications Commission (FCC). However, sometimes OTDOA positioning accuracy is such that an OTDOA-requested wireless signal captured from a nearby cellular base station facilitates or supports appropriate measurements (eg, a reference signal time difference), for example. In cases such as having low power or not having enough power, it may be at least partially affected by reception sensitivity or hearability issues. In some cases, OTDOA positioning accuracy may also be affected, for example, at least in part by signal multipath or scattering effects, which may introduce errors in the observed arrival time of the OTDOA reference signal. E911 OTDOA positioning is also sometimes a dedicated location server for managing OTDOA positioning, for example by providing assistance data (eg, OTDOA requests, reference signals, etc.) to mobile communication devices and calculating location estimates Can rely on, or rely on, a dedicated positioning architecture.

  [0005] Non-limiting and non-inclusive aspects are described with reference to the following figures, wherein like reference numerals refer to like parts throughout the various views unless otherwise specified. Point to.

[0006] FIG. 1 is a conceptual diagram illustrating features associated with an example implementation of an operating environment. [0007] FIG. 2 is a flow diagram illustrating an example process implementation that may facilitate and / or support improved E911 positioning via background signal tracking. [0008] FIG. 3 is a conceptual diagram illustrating an implementation of an example computing environment associated with a mobile device. [0009] FIG. 4 is a conceptual diagram illustrating an example implementation of an computing environment associated with a server.

  [0010] An example implementation relates to a technique for improved E911 positioning via background signal tracking. In one implementation, the method obtains one or more observations of one or more terrestrial signals, stores the one or more observations in local memory, and responds to an emergency event Retrieving one or more stored observations for use at least in part to capture one or more reference signals, and based at least in part on the one or more stored observations Determining a location fix of the mobile device.

  [0011] In another implementation, an apparatus includes: means for obtaining one or more observations of one or more terrestrial signals; means for storing one or more observations in a local memory; Means for retrieving one or more stored observations for use at least in part to capture one or more reference signals in response to an emergency event; and one or more stored observations Means for determining a position fix of the mobile device based at least in part.

  [0012] In yet another implementation, an apparatus includes a wireless transceiver for communicating with an electronic communication network, wherein the wireless transceiver obtains one or more observations of one or more terrestrial signals. One or more processors configured and coupled to the memory and the wireless transceiver, wherein the one or more processors store one or more observations in local memory and in response to an emergency event; Retrieving one or more stored observations for use at least in part to capture one or more reference signals and based at least in part on the one or more stored observations, the mobile device And determining a position fix of.

  [0013] In yet another implementation, a product comprises a non-transitory storage medium having instructions executable by a processor, the instructions obtaining one or more observations of one or more terrestrial signals; Storing one or more observations in local memory and retrieving one or more stored observations for use at least in part to capture one or more reference signals in response to an emergency event And determining a position fix of the mobile device based at least in part on the one or more stored observations. However, it should be understood that these are merely exemplary implementations and that the subject matter recited in the claims is not limited to these specific implementations.

Detailed Description of the Invention

  [0014] In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the subject matter recited in the claims. However, it will be appreciated by persons skilled in the art that the subject matter recited in the claims can be practiced without these specific details. In other instances, methods, apparatuses, or systems known to those skilled in the art have not been described in detail so as not to obscure the subject matter recited in the claims.

  [0015] To facilitate or support one or more operations and / or techniques for improved E911 positioning via background signal tracking for use in or with a mobile communication device. Several example methods, apparatus, or articles of manufacture that can be implemented in whole or in part are disclosed herein. As will be appreciated, depending on the implementation, background signal tracking may be used for positioning reference signals (PRS) and / or cell specific reference signals for OTDOA in 4G Long Term Evolution (LTE) communication networks. Tracking a (CRS) signal, a 1x signal for AFLT in a code division multiple access (CDMA) communication network, a satellite positioning system (SPS) signal, or the like. As used herein, the terms “mobile device”, “mobile communication device”, “location-aware mobile device”, or similar terms may be used interchangeably and may have varying positions or locations from time to time. Can refer to any type of special purpose computing platform or device. In some cases, a mobile communication device may be able to communicate with a mobile or other device that is not, eg, through wireless transmission or reception of information according to one or more communication protocols. For illustrative purposes, special purpose mobile communication devices, which may be simply referred to herein as mobile devices, are, for example, cellular phones, smartphones, personal digital assistants (PDAs), laptop computers, personal entertainment systems, tablet personal computers (PC), personal audio or video device, personal navigation device, wireless heat map generation tool, or the like. However, these are merely examples of mobile devices that can be used at least in part to implement one or more operations or techniques for improved E911 positioning via background signal tracking, and It should be appreciated that the claimed subject matter is not limited in this respect. It should also be noted that the terms “position” and “location” may be used interchangeably herein.

  [0016] As previously implied, a location fix for a mobile device such as a cellular phone may be obtained based at least in part on information collected from various systems, for example. One such system may comprise, for example, an OTDOA positioning system. In this system, the dedicated location server provides one or more reference signal time differences (RSTD) obtained from, for example, providing OTDOA positioning assistance data such as reference cell data and / or neighboring cell data and from a mobile device. OTDOA positioning for mobile devices may be managed by calculating and / or verifying position fixes using signal time difference measurements. For example, OTDOA positioning in LTE is generally known and described in detail herein, as described in a document from an organization named “3rd Generation Partnership Project” (“3GPP®”). Need not be explained. In some cases, the use of OTDOA to obtain a position fix may be used, for example, when positioning via acquisition of signals transmitted from the Global Navigation Satellite System (GNSS) is not available. And / or may provide a more accurate position fix than a position fix via only extended cell ID detection.

  [0017] In some cases, the OTDOA system may dispatch an appropriate first responder (eg, fire, police, ambulance, etc.) to a mobile device location, eg, in response to a 911 emergency call originating from the device. One or more emergency services, such as an E911 emergency service, may be supported. Thus, in response to an emergency 911 call to a Public Safety Answering Point (PSAP), for example, the PSAP may determine the emergency caller's estimated location for expedited public safety services. An operation for determining Here, the mobile device may receive a message comprising an OTDOA request, positioning assistance data, etc. from the OTDOA location server, for example, in response to detecting an emergency event in the PSAP. In response to this message, the mobile device obtains one or more observations, for example, and uses these observations for one or more appropriate techniques (eg, triangulation, etc.) An E911 OTDOA positioning session may be initiated, such as sending to a location server for calculation. In this context, an “observation” is a measurement of a wireless signal that is transmitted by a wireless transmitter and captured by an observing receiver or other sensor that is co-located with the mobile device. Refers to the attribute or characteristic that was created. In some cases, one or more observations may be, for example, PRS and / or CRS arrival time (TOA) or time difference of arrival (TOA) transmitted by a nearby cellular base station and captured at a mobile device receiver ( Although one or more measurements of TDOA) may be included, the claimed subject matter is not so limited. For example, sometimes one or more observations may comprise one or more TOAs of a CDMA pilot measurement in AFLT, for example. In calculating the location fix, the location server may communicate the fix to the appropriate PSAP, for example, to dispatch the appropriate first responder as indicated.

  [0018] However, sometimes, for example, during an OTDOA positioning session, such as shown in response to receiving a message indicating an E911 emergency event, all current activities for obtaining position fixes (eg, GNSS signal Capture, etc.) may be stopped or stopped. In some cases, the mobile device obtains current observations, for example, for faster and / or more accurate calculation of position fixes, since the current activity for obtaining position fixes is aborted In doing so, it may not be possible to further utilize one or more observations acquired prior to the E911 OTDOA positioning session. For example, as will be appreciated, one or more observations acquired prior to the E911 OTDOA positioning session can help detect expected multipath and / or shadow-fading situations, If present, receiver sensitivity may be improved, such as by narrowing the search window by concentrating on a specific search range and / or area, or the like. In addition, for example, utilizing observations obtained prior to and / or independent of parameters provided in the E911 message may reduce reliance on dedicated OTDOA positioning systems and / or location servers. , Air interface scalability and / or compatibility may be improved. Also, for example, one possible solution is the introduction of newer services such as Voice over LTE (VoLTE), so that emergency services can quickly migrate to the LTE air interface, so the traditional interface ( (Eg 3G etc.) may no longer be used or supported. Thus, one or more methods, systems, etc. that may implement improved E911 positioning, for example, by utilizing a history of observations obtained prior to and / or independently of an E911 OTDOA positioning session Or it would be desirable to develop the device.

  [0019] Therefore, as will be described in more detail below, in some implementations, for example, only the parameters in the E911 message are used to search the PRS and / or CRS signals again according to an OTDOA session or the like in response to an emergency event. Instead of starting to do so, the mobile device may use one or more previous observations of those signals (eg, measurements such as TOA, TDOA, etc.) stored in local memory. For example, mobile devices typically make measurements such as the wireless wide area network (WWAN) of signals transmitted by serving cells and / or neighboring cells (eg, via background processing), so that applicable observations There may or may not be additional power to store. Thus, once an E911 OTDOA location session is initiated, the stored observations can be accessed or retrieved, for example, by appropriate processing driving on the mobile device, and similarly understood. As such, signals applicable in an E911 session can be used at least in part to facilitate or support searching or capturing. Even though the discussion refers to PRS and / or CRS signals in LTE, for example, to simplify the description, any other suitable signals such as 1x signals for AFLT in CDMA, GNSS signals, etc. Note that / or communication networks may be utilized herein, in whole or in part, such as in a similar or similar manner.

  [0020] FIG. 1 illustrates one or more processes or operations for improved E911 positioning via background signal tracking, for use in or with a mobile device, such as, for example, a location-aware mobile device 102. FIG. 2 is a conceptual diagram illustrating features associated with an implementation of an example operating environment 100 that can be facilitated or supported. The operating environment 100 may be a variety of electronic communication networks or the like, such as a public network (eg, the Internet, World Wide Web), a private network (eg, an intranet), a WWAN, a wireless local area network (such as a WLAN) or the like. It should be appreciated that the invention is described herein as a non-limiting example that can be implemented in whole or in part in the context of a network combination. It should also be noted that the subject matter recited in the claims is not limited to indoor implementation. For example, sometimes one or more of the operations or techniques described herein may be performed at least partially in an indoor-like environment, such as a valley of a city building, a town square May include partially or substantially enclosed areas, such as an amphitheater, a multi-storey car park, a rooftop garden, a courtyard, or the like. Sometimes, one or more operations or techniques described herein may be performed at least partially in an outdoor environment.

  [0021] As illustrated, in some implementations, the mobile device 102 may receive or acquire a satellite positioning system (SPS) signal 104 from an SPS satellite 106, for example. In some cases, the SPS satellite 106 may be from a single global navigation satellite system (GNSS), such as, for example, a GPS or Galileo satellite system. In other cases, the SPS satellite 106 may be from multiple GNSSs such as, but not limited to, GPS, Galileo, Glonas, or Hokuto (compass) satellite systems. In certain implementations, the SPS satellite 106 is from any of several regional navigation satellite systems (RNSS) such as WAAS, EGNOS, QZSS, to name just a few. possible.

  [0022] Sometimes, the mobile device 102 may, for example, transmit a wireless signal to or receive a wireless signal from a suitable wireless communication network. In one example, the mobile device 102 can communicate with a cellular communication network, such as by transmitting a wireless signal to or receiving a wireless signal from the base station transceiver 108, eg, via a wireless communication link 110. Can communicate. Similarly, the mobile device 102 may transmit wireless signals to the local transceiver 112 or receive wireless signals from the local transceiver 112 via the wireless communication link 114. Base station transceiver 108, local transceiver 112, etc. may be of the same or similar type, or different types, such as access point, wireless beacon, cellular base station, femto cell, or the like, depending on the implementation. Device may be represented. In some instances, the local transceiver 112 may comprise a wireless transmitter or receiver capable of transmitting or receiving wireless signals, for example. For example, as will be appreciated, sometimes the wireless transceiver 112 may be able to obtain one or more observations from one or more other terrestrial transmitters.

  [0023] In certain implementations, the local transceiver 112 communicates with the mobile device 102 over a shorter range via the wireless communication link 114 than the range established via the base station transceiver 108 through the wireless communication link 110. It may be possible. For example, the local transceiver 112 may be located indoors or in a similar environment, such as a wireless local area network (WLAN, eg, IEEE Std. 802.11 network), or a wireless personal area network (WPAN, eg, Bluetooth®). ) Network etc.). In another example implementation, local transceiver 112 may comprise a femtocell or picocell that can facilitate communication over link 114 according to applicable cellular or similar wireless communication protocols. Of course, it should be understood that these are merely examples of a network that can communicate with the mobile device 102 via a wireless link, and the claimed subject matter is not limited in this respect. . For example, in some cases, operating environment 100 may include a greater number of base station transceivers 108, local transceivers 112, and the like.

  [0024] In some implementations, base station transceiver 108, local transceiver 112, etc. may communicate with servers 116, 118, or 120 over network 122 via one or more links 124. Network 122 may comprise any combination of wired or wireless communication links, for example. In a specific implementation, the network 122 facilitates communication between the mobile device 102 and one or more servers 116, 118, 120, etc., eg, via the local transceiver 112, the base station transceiver 108, etc. It may comprise an Internet Protocol (IP) type infrastructure that can be supported. In another implementation, the network 122 may comprise a cellular communication network infrastructure such as a base station controller or a master switching center, for example, to facilitate or support mobile cellular communication with the mobile device 102. As shown, in some cases, the network 122 facilitates or supports communication with a PSAP or similar entity, such as for the purpose of initiating and / or implementing an E911 OTDOA positioning session. obtain. Servers 116, 118, and / or 120 may comprise any suitable server or combination thereof that can facilitate or support one or more operations or techniques described herein. For example, server 116, 118, or 120 may include one or more location servers (eg, Evolved Serving Mobile Location Server (E-SMLC), Secure User Plane Location Server / SUPL Location Platform (SUPL SLP), etc.), positioning assistance It may comprise a server, a navigation server, a map server, a crowdsourcing server, a network related server, or the like.

  [0025] In certain implementations and as described below, the mobile device 102 is capable of determining an initial or otherwise position fix or estimated location of the mobile device 102. And may have processing resources. For example, if satellite signal 104 is available, mobile device 102 may calculate a position fix based at least in part on pseudorange measurements up to four or more SPS satellites 106. Here, the mobile device 102 may calculate such pseudorange measurements based at least in part on pseudonoise code phase detection in signals 104 acquired from four or more SPS satellites 106. In certain implementations, the mobile device 102 may include signals transmitted by the SPS satellite 106, including, for example, almanac, ephemeris data, Doppler search windows, to name just a few. Positioning assistance data to help capture 104 may be received from one or more servers 116, 118, or 120.

  [0026] In some implementations, the mobile device 102 has one or more located at a known location using any of several techniques such as, for example, OTDOA, AFLT, or the like. The position fix may be obtained by processing wireless signals received from other terrestrial transmitters (eg, base station transceiver 108, local transceiver 112, etc.). In these techniques, the range from the mobile device 102 is transmitted, for example, by one or more of the reference signals (eg, PRS, CRS, etc.) transmitted by these transmitters and received at the mobile device 102, as shown. Can be measured with three or more terrestrial transmitters based at least in part. Here, the servers 116, 118, or 120 may, for example, facilitate terrestrial transmitter OTDOA reference cell data, OTDOA neighbors to facilitate one or more applicable positioning techniques (eg, AFLT, OTDOA, etc.). It may be possible to provide positioning assistance data to the mobile device 102, including cell data, PRC and / or CRS configuration data, RSTD search window, location, identity, orientation, and the like. Sometimes, the servers 116, 118, or 120 are, for example, locations of cellular base stations (eg, base station transceiver 108, local transceiver 112, etc.) in one or more specific areas or regions associated with the operating environment 100. Base station almanac (BSA) indicating identity, direction, etc.

  [0027] As implied above, in certain environments, such as indoors or similar environments (eg, valleys in urban buildings), the mobile device 102 has a sufficient number to perform appropriate positioning techniques. May not be able to capture or process signals 104 from other SPS satellites 106. As such, optionally or alternatively, the mobile device 102 may perform position fix based at least in part on signals captured from one or more local transmitters, such as femtocells, Wi-Fi access points, or the like. It may be possible to determine For example, the mobile device 102 may obtain a position fix by measuring a range with three or more local transceivers 112 positioned at a known location. In some implementations, the mobile device 102 may measure the range, for example, by obtaining a MAC address from the local transceiver 112, as shown.

  [0028] In certain implementations, the mobile device 102 may receive positioning assistance data for one or more positioning operations from, for example, the servers 116, 118, and / or 120. Sometimes the positioning assistance data is located at a known location for measuring ranges for these transmitters based at least in part on, for example, RTT, TOA, TDOA, etc., or any combination thereof. May include location, identity, direction, etc., such as one or more local transceivers 112, base station transceivers 108, etc. In some cases, positioning assistance data for assisting indoor positioning operations may include, for example, a wireless heat map, a context parameter map, a route capability graph, etc., to name just a few. Other assistance data received by the mobile device 102 may include, for example, an electronic digital map of an indoor or similar area to display navigation or to aid navigation. The map may be provided to the mobile device 102 upon entering a particular area, for example, points of interest such as a restroom, pay phone, room name, store, or the like, doors, hallways, Applicable features such as entrances, walls, etc. may be shown. By obtaining a digital map of an area of interest, such as indoors, the mobile device 102 may provide additional context, a frame of reference, or the like to associated users, for example. In addition, it may be possible to overlay its current location on the displayed map of this area. The terms “positioning assistance data” and “navigation assistance data” may be used interchangeably herein.

  [0029] According to some implementations, the mobile device 102 accesses indoor navigation assistance data via the servers 116, 118, or 120, for example, by requesting such data through selection of a universal resource locator (URL). obtain. In certain implementations, the servers 116, 118, or 120 include, for example, building floors, hospital wings, airport terminals, university campus portions, and large shopping mall areas, to name just a few. It may be possible to provide indoor navigation assistance data to cover many different indoor areas. Also, if the memory or data transmission resource at the mobile device 102 receives unrealistic or infeasible indoor positioning assistance data for all areas serviced by the servers 116, 118, or 120, from the mobile device 102 The request for such data may indicate a rough or coarse estimate of the location of the mobile device 102, for example. The mobile device 102 may then be provided with indoor navigation assistance data that covers, for example, one or more areas that include, or are close to, the approximate location of the mobile device 102. In some cases, one or more servers 116, 118, or 120 may have one or more background processes, RSTDs, or the like to determine location fixes, etc., for example, in connection with an E911 OTDOA positioning session. May facilitate or support obtaining one or more observations, such as stored in a local memory of the mobile device 102 via measurements, and located in an applicable PSAP via the network 122 Can provide a fix.

  [0030] Although a particular number of computing platforms and / or devices are illustrated herein, any number of suitable computing platforms and / or devices may be associated with operating environment 100 May be implemented to facilitate or support the techniques or processes. For example, sometimes the network 122 expands the coverage area for communication with the mobile device 102, one or more base stations 108, the local transceiver 112, the servers 116, 118, 120, or the like. It can be coupled to one or more wired or wireless communication networks (eg, WLAN, etc.). In some cases, the network 122 may facilitate or support, for example, a femto cell based operating area of coverage. Again, these are merely exemplary implementations, and the subject matter recited in the claims is not limited in this respect.

  [0031] In view of this, attention is directed to FIG. 2, which provides background signal tracking for use in or with a location-aware mobile device, such as, for example, the mobile device 102 of FIG. FIG. 6 is a flow diagram illustrating an implementation of an example process 200 that may be performed in whole or in part to facilitate or support one or more operations or techniques for improved E911 positioning via . Note that information captured or created, such as, for example, input signals, output signals, actions, results, etc., associated with the exemplary process 200 can be represented via one or more digital signals. . While one or more operations are illustrated or described simultaneously or in connection with a particular sequence, it should also be appreciated that other sequences or simultaneous operations may be used. In addition, the following description refers to particular aspects or features illustrated in certain other figures, but one or more operations may be performed using other aspects or features.

  [0032] The example process 200 may begin at operation 202 with, for example, obtaining one or more observations of one or more terrestrial signals. As indicated, while traveling within a region or area of interest, the mobile device may, for example, include one or more serving and / or neighboring cellular base stations, WLAN access points, Bluetooth beacons, etc., or any of them Terrestrial wireless signals from one or more nearby or “visible” wireless transmitters, such as combinations, may be observed, eg received and / or captured. The mobile device may decode certain parameters or attributes encoded in the captured signal using, for example, one or more suitable techniques. In some cases, the parameter or attribute is, for example, an observed wireless transmitter identity (eg, cell ID, MAC address, etc.), as well as received signal strength, round trip time, or similar characteristics, or An aspect of the captured wireless signal may be provided.

  [0033] In at least one implementation, the one or more observations may comprise TOA or TDOA measurements of PRS and / or CRS signals, eg, transmitted by one or more neighboring cellular base stations. . Typically, PRS and / or CRS are implemented when appropriate or useful, for example to increase or improve the “audibility” or detectability of a sufficient number of geographically dispersed cellular base stations. obtain. The PRS and / or CRS may be transmitted periodically, eg, in several consecutive subframes or predefined positioning subframes grouped by so-called “positioning occasions”. However, the PRS and / or CRS positioning opportunities may differ in the sense that the CRS may have a more periodic instance, such as continuous acquisition (eg, every second) and / or the respective observations. It may at least partially affect the power consumption of the mobile device in some way, such as through processing. As such, in some cases, utilizing PRS, such as to facilitate or support one or more operations or techniques discussed herein, is more desirable and / or useful with respect to, for example, CRS It can be. However, the subject matter recited in the claims is not limited to specific signals and / or implementations, for example, reception and / or in connection with an assisted GPS (A-GPS) system or the like. Or any suitable signal such as satellite signals as captured, 1x signal for AFLT in CDMA, CRS may be used or otherwise considered at least in part herein. Note that it means.

  [0034] For operation 204, for example, one or more observations may be stored in local memory. For example, one or more observations, as described above, may be one or more digital implementations through a suitable process, such as background processing or a host application, as one possible implementation. Like a signal, it can be retrieved and / or stored. The host application or similar processing may be provided to the user's mobile device by an appropriate server, for example, and stored locally, such as on the mobile device. An application or process is activated, initiated, for example, upon request, user input, or the like, when a user turns on, restarts, or activates a mobile device that is within a region or area of interest Can be downloaded, etc. As indicated, during in operative use, a mobile device typically has one or more adjacent wireless transmitters, such as, for example, one or more serving cellular base stations and / or neighboring cellular base stations. One or more observations can be stored in local memory without additional power or with little additional power because the WWAN measurement of the terrestrial signal transmitted by is performed.

  [0035] In operation 206, in response to an emergency event, one or more stored observations may be retrieved, for example, for use at least in part to capture one or more reference signals. In some cases, an emergency event may be detected and received at a mobile device, for example, via a message indicating the emergency event, to illustrate just one example of a possible implementation. A message indicating an emergency event is an LTE positioning protocol that is communicated over an appropriate transport channel in response to detection of an emergency event in the PSAP, such as an emergency 911 call issued from a mobile device, as described above, for example. (LPP / LPPe) messages may be provided. Sometimes a message indicating an emergency event may follow a capability exchange or similar communication between the OTDOA Location Server and the mobile device, such as, for example, a request capability type message and response. Also, as indicated, upon receiving a message indicating an emergency event, the mobile device ceases all current activity to obtain a location fix (eg, acquisition of a GNSS signal, for example). At the point, an E911 OTDOA positioning session may be initiated. Thus, here, when acquiring current observations of PRS and / or CRS, one or more acquired before stopping all current positioning activities (eg, prior to the E911 OTDOA positioning session). To take advantage of observations, the mobile device may use, for example, a history of one or more previous PRS and / or CRS observations stored in local memory.

  [0036] More specifically, in some implementations, in response to the initiation of an E911 OTDOA positioning session, the mobile device may, for example, access its local memory, any of which are appropriate and applicable. One or more stored TOA or TDOA measurements of one or more previously observed PRS and / or CRS signals may be retrieved. The mobile device may also receive GNSS positioning assistance data when available (eg, when not in a GNSS denial environment such as indoors, etc.) and / or a neighboring cellular base, eg, according to E911 OTDOA positioning procedure, etc. OTDOA positioning assistance data may be captured or received using a request to obtain current RSTD measurements from a station (eg, reference, neighbor, etc.). As indicated, the positioning assistance data may include parameters useful for acquisition of, for example, GNSS signals and / or PRS and / or CRS signals, if available (eg, candidate cellular base stations, PRSs). And / or CRS configuration, desired accuracy, response time, channel, ephemeris, frequency window, etc.).

  [0037] Thus, in some cases, instead of making RSTD measurements, such as using provided positioning assistance data, which may waste time and / or resources, the mobile device may One or more retrieved recent TOA or TDOA measurements may be communicated to a location server, such as for faster calculations. Sometimes the position fix may be calculated at or by the mobile device, such as using one or more retrieved recent TOA or TDOA measurements, and the location or other via an appropriate message Can be provided to any suitable server. This may also be useful if the PRS and / or CRS signals are attenuated or blocked, such as at the start or after the start of the R911 OTDOA positioning session.

  [0038] In a specific implementation, a mobile device may define or characterize an associated wireless environment, eg, for more accurate or error-free acquisition of current PRS and / or CRS signals. One or more retrieved observations may be used. For example, using the history of observations, the mobile device can make decisions regarding expected multipath and / or shadow fading conditions, and / or between true and biased TOA or TDOA measurements May be possible to distinguish. That is, if a mobile device is continuously tracking applicable signals, the mobile device uses true TOA or TDOA measurements, regardless of user movement over the measurement period, May be biased using TOA or TDOA measurements associated with one or more previous EAPs and may have a better opportunity to lock onto (EAP) or detect it TOA or TDOA measurements may be used to detect or determine out-of-sight or similar paths.

  [0039] In another implementation, one or more observations acquired prior to the E911 OTDOA positioning session are received, for example, by narrowing the search window by concentrating on a specific search range and / or area. The sensitivity can be improved. Here, if the PRS and / or CRS is temporarily lost, eg, prior to the start of OTDOA in an E911 positioning session, one or more stored observations of the PRS and / or CRS may By providing a mobile device with some notion of where such a signal can be found, such as by reducing, concentrating on a particular candidate, etc. (eg, the signal is recent and / or previously Because it was tracked etc.) In some cases, this narrows the expected RSTD search window size or other uncertainty parameter provided by the location server in a message indicating an emergency event, for example, as one possible example. For example, the uncertainty of the search can be further reduced. As a result, one or more reference signals can be captured, for example, more effectively and / or more efficiently, which can improve power and / or resource consumption, or the like.

  [0040] In operation 208, the location fix of the mobile device may be calculated based at least in part on, for example, one or more stored observations. As indicated, the mobile device location fix may include, for example, observations associated with one or more stored TOA or TDOA that the mobile device has previously received from two or more pairs of cellular base stations. It can be calculated in connection with an observed time difference of arrival (OTDOA) technique that can be used. As such, using stored observations, the mobile device can be based at least in part on a known location and measured transmission timing for a base station, for example to illustrate just one example of a possible implementation. To obtain a position fix. The calculated position fix may be provided to a location or other suitable server, for example, via an appropriate message. This may be useful when the PRS and / or CRS signals are attenuated or blocked, as indicated, for example, at or after the start of the R911 OTDOA positioning session.

  [0041] Sometimes, a mobile device may enhance one or more observations in some way, such as for more effective and / or more efficient acquisition and / or communication of position fixes, for example. It may be possible to utilize one or more on-board sensors. For example, to illustrate just one example of a possible implementation, an accelerometer or similar inertial sensor placed on a mobile device can be used at least in part to estimate the location of the mobile device by dead reckoning. . Here, the accelerometer can approximate the current location of the mobile device, for example based at least in part on the position fix associated with the last known TOA or TDOA, and the known movement over several elapsed times. Use the direction and / or estimated speed to increment its position fix. Thus, by way of example, if a position fix associated with TOA or TDOA is acquired every 10.0 seconds, for example, an accelerometer or similar inertial sensor will have many additional location estimates during this 10 second period. Can enhance one or more observations, which can reduce position verification time. Note that one or more observations may be enhanced before their storage, eg, from local memory, and / or after their retrieval. Of course, these are merely details related to enhancing one or more observations using sensor data, and the subject matter recited in the claims is not so limited. Also, the subject matter recited in the claims is not limited to accelerometers or similar sensors. Any other suitable sensor or combination of sensors associated with the mobile device may be utilized at least in part to augment one or more observations with the sensor data in a similar manner.

  [0042] In some cases, one or more stored observations of PRS and / or CRS may be generated from, for example, observations obtained prior to the start of an E911 OTDOA positioning session. Enables mobile devices to extend the benefit of consecutive measurements, such as by continuous measurement filtering, to reduce noise to one or more PRS and / or CRS observations acquired later To do. For example, if a mobile device has LTE Doppler capabilities and / or concepts, it is usually, but not necessarily, more accurate than TOA or TDOA, and then continuous measurements are, for example, current Filtering or smoothing at least partially by weighting the Doppler propagated signal from previously acquired measurements, such as for the current epoch, along with the TOA or TDOA estimate itself Can be Thus, sometimes, weighting the Doppler propagated signal may result in less noise than, for example, current TOA or TDOA estimates. In some cases, Doppler growth usually provided, for example, an applicable measurement change (eg, delta), while TOA or TDOA could provide an absolute measurement, so current Doppler growth It may be useful to weight the signal. Thus, in some cases, it may be useful to limit the use of such deltas in an appropriate manner, which may be determined experimentally and / or dynamically (eg, predetermined) Etc.). In addition, the utilization of observations obtained, for example, before and / or independently of parameters provided in the E911 message can be used for dedicated OTDOA positioning systems and / or location servers, as indicated. It may reduce trust and improve air interface scalability and / or dependency on compatibility or the like.

  [0043] To reiterate, the discussion herein is provided in terms of PRS and / or CRS signals for ease of explanation, etc. 1x signals for AFLT in CDMA, GNSS signals, etc. Any other suitable signal and / or communication network, such as one or more operations for improved E911 positioning via background signal tracking and the like, such as in a similar or similar manner, and / or It can be used in whole or in part to facilitate or support the technique. For example, background GNSS signal tracking may consume a relatively large amount of power and / or processing resources, but may nevertheless be implemented without departing from the claimed subject matter. . Thus, in some cases, such as indoor or similar open sky environments, for example, the energy efficient duty cycling technique of the newer GNSS chip architecture is very low, such as for continuous tracking of GNSS signals It may be possible to keep the GNSS process fresh at average power (eg, via an always-on positioning application running in the background without assistance from other applications, etc.).

  [0044] FIG. 3 illustrates a mobile device that can be used at least in part to facilitate or support one or more operations and / or techniques for improved E911 positioning via background signal tracking. FIG. 2 is a conceptual diagram of an example implementation of an associated computing environment. Although the example computing environment may comprise a mobile device 300 that may include, for example, one or more features or aspects of the mobile device 102 of FIG. 1, subject matter recited in the claims is so limited. Not. For example, in some cases, the mobile device 300 includes a wireless transceiver 302 that can transmit and / or receive wireless signals generally referred to at 304 over an appropriate wireless communication network, such as via an antenna 306. Can be prepared. The wireless transceiver 302 may be capable of sending or receiving one or more suitable communications, such as, for example, one or more communications described with respect to FIGS. The wireless transceiver 302 may be coupled or connected to the bus 308 via a wireless transceiver bus interface 310, for example. Depending on certain implementations, sometimes wireless transceiver bus interface 310 may be at least partially integrated with, for example, wireless transceiver 302. Some implementations support WLAN or WiFi, code division multiple access (CDMA), wideband CDMA (W-CDMA®), long term evolution (LTE), Bluetooth, etc., to name just a few. Multiple wireless transceivers 302 or antennas 306 may be included to allow signals to be transmitted or received according to multiple wireless communication standards.

  [0045] In some implementations, the mobile device 300 can receive or capture one or more SPS or other suitable wireless signals 314, such as via an SPS or similar antenna 316, or the like. A similar receiver 312 may be provided. The SPS receiver 312 may process, in whole or in part, one or more captured SPS signals 314 to estimate the location of the mobile device 300, first or not. In some instances, one or more general purpose / application processors 318 (hereinafter referred to as “processors”), memory 320, digital signal processor (DSP) 322, or similar dedicated device or processor, not shown, In part or in part, in conjunction with an SPS receiver 312 or the like, it can be utilized to process the captured SPS signal 314 and calculate the location of the mobile device 300. For example, in connection with one or more techniques for improved E911 positioning via background signal tracking, etc., storage of SPS or other signals for implementing one or more positioning operations may include memory 320, It can be done at least in part in a suitable register or buffer (not shown). Although not shown, in at least one implementation, one or more processors 318, memory 320, DSP 320, or similar dedicated device or processor may obtain one or more observations of one or more terrestrial signals; Storing one or more observations in local memory and, in response to an emergency event, one or more stored observations for use at least in part to capture one or more reference signals One or more processing modules may be provided that may perform the retrieving and determining a position fix of the mobile device 300 based at least in part on the one or more stored observations. Should be recognized.

  [0046] Note that all or part of one or more processing modules may be implemented using, or otherwise including, hardware, firmware, software, or any combination thereof. I want to be. A processing module may represent one or more circuits capable of performing at least part of an information computation technique or processing. By way of example, but not limitation, processor 318 or DSP 322 may include one or more processors, controllers, microprocessors, microcontrollers, application specific integrated circuits, digital signal processors, programmable logic devices, field programmable gate arrays, central processing units. , Graphics processor unit, or the like, or any combination thereof. As such, sometimes the processor 318 or DSP 322, or any combination thereof, may at least partially implement one or more observations of one or more terrestrial signals, such as to implement the operation 202 of FIG. Means for obtaining may be provided or represented. In addition, in at least one implementation, processor 318 or DSP 322 may have means for storing one or more observations in local memory, eg, at least in part to implement operation 204 of FIG. Or may comprise it. Also, sometimes, processor 318 or DSP 322 may at least partially capture one or more reference signals, eg, in response to an emergency event, such as illustrated or described in operation 206 of FIG. Means may be provided or represented for retrieving one or more stored observations for automatic use. In addition, in some cases, processor 318 or DSP 322 may be based at least in part on one or more stored observations, eg, at least in part to implement operation 208 of FIG. A means for determining a position fix of the mobile device 300 may be provided or represented.

  [0047] As illustrated, the DSP 322 may be coupled or connected to the processor 318 and the memory 320 via the bus 308. Although not shown, in some cases, the bus 308 may be integrated with one or more applicable components of the mobile device 300, such as a DSP 322, processor 318, memory 320, or the like. The above bus interface can be provided. In various embodiments, one or more operations or functions described herein may be performed by memory 320, such as in a computer readable storage medium such as RAM, ROM, FALSH, disk drive, etc., to name just a few. In response to execution of one or more machine-readable instructions stored in the computer. The instructions may be executable, for example, via processor 318, one or more dedicated processors not shown, DSP 322, or the like. The memory 320 may store software code (eg, programming code, instructions, etc.) that may be executable by the processor 318, DSP 322, or the like to perform the operations or functions described herein. Non-transitory processor readable memory, computer readable memory, etc. may be provided.

  [0048] The mobile device 300 may include a user interface 324, which may include a number of devices, such as speakers, microphones, display devices, vibration devices, keyboards, touch screens, etc., to name just a few. Any of these may be included. In at least one implementation, the user interface 324 may allow a user to interact with one or more applications hosted on the mobile device 300. For example, one or more devices of user interface 324 may store on memory 320 an analog or digital signal that is further processed by DSP 322, processor 318, etc. in response to input or action from the user. Similarly, one or more applications hosted on the mobile device 300 may store analog or digital signals in the memory 320 to present output signals to the user. In some implementations, the mobile device 300 includes a dedicated audio input / output (I / O) comprising, for example, a dedicated speaker, microphone, digital-analog circuit, analog-digital circuit, amplifier, gain control, or the like. A device 326 may optionally be included. However, it should be understood that this is merely an example of how the audio I / O device 326 can be implemented and that the subject matter recited in the claims is not limited in this respect. As will be appreciated, mobile device 300 may include one or more touch sensors 328 that touch or respond to similar pressures applied to a keyboard, touch screen, or the like.

  [0049] The mobile device 300 may include one or more sensors 334 coupled or connected to the bus 308, such as, for example, one or more inertial sensors, ambient environment sensors, or the like. . The inertial sensor of sensor 344, to name just a few examples, includes, for example, one or more accelerometers (eg, collectively responsive to the acceleration of mobile device 300, such as in one, two, or three dimensions); For example, it may comprise a gyroscope or magnetometer (to support one or more compass or similar applications, etc.). The ambient environment sensor of the mobile device 300 may comprise, for example, one or more barometric sensors, temperature sensors, ambient light detectors, camera sensors, microphones, etc., to name just a few. The sensor 334 is stored in the memory 320, such as in support of one or more applications directed to positioning or navigation operations, wireless communications, radio heat map learning, video gaming, or the like. And may generate analog or digital signals that can be processed by DSP 322, processor 318, and the like.

  [0050] In certain implementations, the mobile device 300 is dedicated, capable of performing baseband processing of signals received or down-converted via, for example, the wireless transceiver 302, the SPS receiver 312 or the like. A modem processor 336 may or may not be provided. Similarly, modem processor 336 may perform baseband processing of signals that are upconverted for transmission via wireless transceiver 302, for example. In an alternative implementation, instead of having a dedicated modem processor, baseband processing may be performed at least in part by a processor 318, DSP 322, or the like. In addition, in some cases, interface 338 is illustrated as a separate component, but one or more applicable components of mobile device 300, such as bus 308 or SPS receiver 312, for example, May be integrated partially or partially. Optionally or alternatively, SPS receiver 312 may be directly coupled or connected to bus 308. However, it should be understood that these are merely examples of components or structures that may perform baseband processing, and subject matter recited in the claims is not limited in this respect.

  [0051] FIG. 4 partially illustrates one or more operations and / or techniques for improved E911 positioning via background signal tracking, eg, as described above in connection with FIGS. 1 is a conceptual diagram illustrating an implementation of an example computing environment or system 400 that can be associated with or include one or more servers or other devices that can be substantially implemented or supported. The computing environment 400 may include, for example, a first device 402, a second device 404, a third device 406, etc., which may be operatively coupled together via a communication network 408. In some cases, the first device 402 may be a known wireless transmitter, radio heat map, base station almanac, electronic digital map, wireless transmitter database, bias, eg, as described herein. A location server can be provided that can provide positioning assistance parameters such as identity, location, etc. of estimates, signal measurements, or the like. For example, the first device 402 may also be mobile (eg, determined via a last known SPS position fix, dead reckoning using one or more appropriate sensors, etc.) upon request or the like. There may also be a server capable of providing an electronic digital map to the mobile device based at least in part on a coarse or rough estimate of the location of the device. The first device 402 may also include a server capable of providing any other suitable positioning assistance parameter (eg, a wireless heat map, etc.) regarding the location of the mobile device. The second device 404 or the third device 406 may comprise, for example, a mobile device, although the subject matter recited in the claims is not so limited. For example, in some cases, to illustrate another possible implementation, the second device 404 may comprise a server that is functionally or structurally similar to the first device 402. In addition, communication network 408 may comprise one or more wireless transmitters, such as, for example, cellular base stations, Wi-Fi access points, femtocells, or the like. Naturally, the subject matter recited in the claims is not limited in scope in these respects.

  [0052] The first device 402, the second device 404, or the third device 406 may be any device, appliance that may be able to exchange parameters and / or information on the communication network 408. , Platform, or machine. By way of example, but not limitation, any of first device 402, second device 404, or third device 406 may be, for example, a desktop computer, a laptop computer, a workstation, a server device, or the like One or more computing devices or platforms; for example, one or more personal computing or communication devices or appliances such as personal digital assistants, mobile communication devices, or the like; for example, databases or information storage service providers / systems Network service provider / system, internet or internet service provider / system, portal or search engine service provider / system, wireless communication service Scan provider / system computing system or associated service provider capability, such as; or any combination thereof, may include. Any of the first, second, or third devices 402, 404, and 406 may be one of a mobile device, a wireless transmitter or receiver, a server, etc., in accordance with the illustrative implementation described herein. Each can have more than one.

  [0053] In some implementations, the communication network 408 is capable of supporting the exchange of information between at least two of the first device 402, the second device 404, or the third device 406. These communication links, processes, or resources may be represented. By way of example, but not limitation, communication network 408 includes a wireless or wired communication link, telephone or telecommunications system, information bus or channel, fiber optic, ground or space vehicle resource, local area network, wide area network, intranet, internet, It may include a router or switch, or the like, or any combination thereof. There may be additional similar devices operably coupled to the communication network 408, as illustrated, for example, via a dotted box that is partially obscured by the third device 406. All or some of the various devices or networks shown in the process or method, or computing environment 400, as described herein, use hardware, firmware, software, or any combination thereof. It is also recognized that these may or may not be implemented.

  [0054] By way of example, but not limitation, the second device 404 may include at least one processing unit 410 that may be operatively coupled to the memory 412 via the bus 414. Processing unit 410 may represent one or more circuits capable of performing at least part of a suitable computing procedure or process. For example, the processing unit 410 may include one or more processors, controllers, microprocessors, microcontrollers, application specific integrated circuits, digital signal processors, programmable logic devices, field programmable gate arrays, or the like, or any of these Combinations can be included. Although not shown, the second device 404 is based at least in part on one or more received or captured wireless signals from, for example, SPS, one or more cellular base stations, Wi-Fi access points, and the like. A location tracking unit that may initiate an appropriate mobile device position fix, such as in an area of interest. In some implementations, the location tracking unit may be at least partially integrated with a suitable processing unit, such as, for example, processing unit 410, although the subject matter recited in the claims is not so limited . In certain server-based or server-supported implementations, the processing unit 410 is, for example, at least partially to facilitate or support the operations 202, 204, 206, and / or 208 of FIG. A means for obtaining one or more observations of one or more terrestrial signals, a means for storing the one or more observations in a local memory, and one in response to an emergency event Means for retrieving one or more stored observations for use at least in part to capture the reference signal, and a mobile device based at least in part on the one or more stored observations Means for determining a position fix of In some cases, processing unit 410 may include one or more reference signals, eg, to at least partially facilitate or support operations 202, 204, 206, and / or 208 of FIG. Means may be provided for narrowing the search window for acquisition. Depending on certain implementations, the processing unit 410 may also include one or more criteria, eg, to at least partially facilitate or support the operations 202, 204, 206, and / or 208 of FIG. Means may be provided for detecting expected multipaths and / or true early arrival paths (EAP) for signal acquisition.

  [0055] Memory 412 may represent any information storage mechanism or device. The memory 412 may include a primary memory 416 and a secondary memory 418, for example. Primary memory 416 may include, for example, random access memory, read only memory, and the like. Although illustrated in this example as separate from processing unit 410, all or a portion of primary memory 416 may be provided within processing unit 410 or otherwise collocated / coupled thereto. Should be understood. Secondary memory 418 may be one or more types of memory, for example, the same or similar to primary memory, or one or more such as, for example, a disk drive, optical disk drive, tape drive, solid motion state memory drive, etc. Information storage devices or systems. In certain implementations, secondary memory 418 may be operable to accept computer-readable media 420 or otherwise configured to be coupled. The computer-readable medium 420 may include any non-transitory storage medium that may carry or create accessible information, code, or instructions for one or more of the devices in the computing environment 400, for example. Computer readable media 420 may also be referred to as opportunity readable media, storage media, and the like.

  [0056] The second device 404 may include, for example, a communication interface 422 that may provide or otherwise support an operable coupling of the second device 404 to at least a communication network 408. By way of example, and not limitation, communication interface 422 may include a network interface device or card, modem, router, switch, transceiver, and the like. The second device 404 may also include an input / output device 424, for example. The input / output device 424 receives one or more human or machine inputs, or otherwise delivers one or more devices or features that may be configurable to be introduced, or human or machine output, or Otherwise, it may represent one or more devices or features that can be provided. By way of example, and not limitation, input / output device 424 may include an operatively configured display, speaker, keyboard, mouse, trackball, touch screen, information port, or the like.

  [0057] The methods described herein may be implemented by various means depending on the application according to the particular example. For example, such a method may be implemented in hardware, firmware, software, or a combination thereof. In a hardware implementation, for example, a processing unit may include one or more application specific integrated circuits (“ASICs”), digital signal processors (“DSP”), digital signal processing devices (“DSPD”), programmable logic devices ( "PLD"), field programmable gate array ("FPGA"), processor, controller, microcontroller, microprocessor, electronic device, other device unit designed to perform the functions described herein, or these Can be implemented in any combination.

  [0058] Algorithmic descriptions and / or symbolic representations are examples of techniques used by those of ordinary skill in the signal processing and / or related arts to convey the substance of their work to others skilled in the art. The algorithm here and generally is a consistent sequence of operations and / or similar signal processing that leads to the desired result. In this context, operations and / or processes include physical manipulation of physical quantities. Usually, though not necessarily, such quantities are stored, transferred, combined, compared, processed, or otherwise as signal measurements, text, images, video, audio, etc. It can take the form of electronic and / or magnetic signals and / or states that can be manipulated as electronic signals and / or states that represent various forms of sensitive content. It is sometimes, mainly for public use reasons, like bits, values, elements, symbols, characters, terms, numbers, numbers, measurements, messages, parameters, frames, packets, content, and / or the like Have proven convenient to refer to such physical signals and / or physical states. However, it is to be understood that all of these and / or similar terms are to be associated with the appropriate physical quantities or indicators and are merely convenient labels. Unless otherwise stated, as will be clear from the previous discussion, throughout this specification, “processing”, “calculating”, “calculating”, “determining”, “establishing” , “Acquiring”, “acquiring”, “identifying”, “selecting”, “generating”, etc. and / or similar considerations may be used for special purpose computers and It will be appreciated that / or may refer to actions or processes of a particular device, such as a special purpose electronic computing device and / or a network device. Thus, in the context of this specification, a special purpose computer and / or similar special purpose computing and / or network device is typically a physical electronic and / or magnetic quantity in memory, registers, and / or other Process, manipulate, and / or convert signals and / or states represented as storage devices, transmission devices, and / or display devices of special purpose computers and / or similar special purpose computing and / or network devices. It is possible. In the context of this particular patent application, as described, the term “specific device” refers to a versatile computer, etc. once it is programmed to perform a specific function according to instructions from the program software Versatile computing and / or network devices.

  [0059] In some circumstances, an operation of a memory device, such as changing state, for example, from binary 1 to binary 0, or vice versa, may comprise a conversion, such as a physical conversion. Similarly, the operation of a memory device for storing bits, values, elements, symbols, characters, terms, numbers, numbers, measurements, messages, parameters, frames, packets, content, and / or the like is physical. A conversion may be provided. With certain types of memory devices, such physical transformations can have physical transformations of articles that are different states or things. For example, but not limited to, for some types of memory devices, the change of state may include charge accumulation and / or storage, or release of stored charges. Similarly, in other memory devices, the change in state may be a physical change, such as a magnetic orientation change and / or a physical change, and / or from a crystalline structure to an amorphous structure, and vice versa. Similarly, molecular structure transformations such as can be provided. In yet other memory devices, the change in physical state may include quantum mechanical phenomena, such as superposition, entrainment, and / or the like, which may include, for example, quantum mechanical bits (quantum bits) . The foregoing is intended to be a comprehensive list of all examples where state changes in a memory device from binary 1 to binary 0, or vice versa, may comprise transformations such as physical transformations. . Furthermore, the foregoing is intended to be illustrative examples.

  [0060] The wireless communication techniques described herein include various wireless communication networks such as a wireless wide area network ("WWAN"), a wireless local area network ("WLAN"), a wireless personal area network (WPAN), and so on. Can connect with. The terms “network” and “system” may be used interchangeably herein. WWAN includes code division multiple access (“CDMA”) networks, time division multiple access (“TDMA”) networks, frequency division multiple access (“FDMA”) networks, orthogonal frequency multiple access (“OFDMA”) networks, and single carrier frequency. It may be a split multiple access (“SC-FDMA”) network, or any combination of the above networks. A CDMA network may implement one or more radio access technologies (“RAT”), such as cdma2000, wideband CDMA (“W-CDMA”), etc., to name just a few examples of radio techniques, where cdma2000. May include technologies implemented by IS-95, IS-2000, and IS-856 standards, TDMA networks include Global System for Mobile Communications (GSM), Digital Advanced Mobile Phone System (D-AMPS). ), Or some other RAT, GSM and W-CDMA are described in documents from an organization called “3rd Generation Partnership Project (“ 3GPP ”). Generation Partnership Project 2 3GPP 2) "is described in documents from 3GPP and 3GPP2 documents are available to the public. 4G Long Term Evolution (" LTE ") communication networks are also described in some aspects in this application. For example, a WLAN may comprise an IEEE 802.11x network and a WPAN may comprise a Bluetooth network, IEEE 802.15x.Implementation of wireless communication as described herein. Can also be used in connection with any combination of WWAN, WLAN, or WPAN.

  [0061] In another aspect, as described above, a wireless transmitter or access point may comprise a femto cell and is utilized to extend cellular telephone service to the workplace or home. In such an implementation, one or more mobile devices may communicate with the femtocell via, for example, a code division multiple access (CDMA) cellular communication protocol, which is routed through another broadband network such as the Internet. Mobile device access to larger cellular telecommunication networks.

  [0062] The techniques described herein may be used with an SPS that includes any of a number of GNSS, and / or any combination of GNSS. Further, such techniques may be used with terrestrial transmitters that act as “pseudolites” or positioning systems that utilize a combination of SV and such terrestrial transmitters. A terrestrial transmitter may include, for example, a terrestrial transmitter that broadcasts a PN code or other ranging code (eg, similar to a GPS or CDMA cellular signal). Such a transmitter may be assigned a unique PN code to allow identification by a remote receiver. Terrestrial transmitters enhance SPS in situations where SPS signals from orbiting SVs may not be available, such as in tunnels, mines, buildings, urban canyons, or other enclosed areas Can be useful. Another implementation of pseudolites is known as a wireless beacon. The term “SV”, as used herein, is intended to include terrestrial transmitters that serve as pseudolites, pseudolite equivalents, and possibly others. The terms “SPS signal” and / or “SV signal” as used herein serve as pseudolites or pseudolite equivalents, including SPS or similar signals from terrestrial transmitters. It is intended to include a terrestrial transmitter that serves.

  [0063] Similarly, in this context, the terms "coupled", "connected", and / or similar terms are commonly used. It should be understood that these terms are not intended to be synonymous. Rather, “connected” is generally used to indicate that two or more components include, for example, a direct physical electronic connection, while “coupled” generally refers to 2 Used to mean that two or more components potentially contain a direct physical electronic connection, but “coupled” also generally means that two or more components are not necessarily directly connected Is used to mean not, but nevertheless means that it can co-operate and / or interact. It is understood that the term coupled also generally means being indirectly connected, for example in an appropriate context.

  [0064] As used herein, "and", "or", "and / or", and / or similar terms are at least partially in the specific context in which such terms are used. Includes various meanings that are expected to depend. Usually, “or”, when used to associate a list such as A, B, or C, as well as A, B, and C, as used herein for a comprehensive sense, It is intended to mean A, B, or C, used in an exclusive sense in the specification. In addition, the term “one or more” and / or similar terms are used in the singular to describe any feature, structure, and / or property, and / or to describe the plural. Can also be used and / or used to describe some other combination of features, structures, and / or properties. Similarly, the term “based on” and / or similar terms is not necessarily intended to convey a comprehensive set of factors, but is understood to be the presence of additional factors that are not necessarily emphasized. . Of course, for all of the foregoing, the specific context of explanation and / or use provides a convenient indicator of the reasoning drawn. The following description is merely for the purpose of illustration and / or use of one or more illustrative examples and claimed subject matter that are not limited to those one or more examples. Note that the specific context provides a convenient indicator of the inference drawn.

  [0065] In this context, the term network device refers to any device capable of communicating over a network and / or as part of a network and may comprise a computing device. A network device may be able to send and / or receive signals (eg, signal packets and / or frames) over a wired and / or wireless network, etc., such as in memory as a physical memory state. It may also be possible to perform arithmetic and / or logical operations, process and / or store signals, and / or operate as, for example, a server in various embodiments. Examples of network devices that can operate as servers, or others, include, for example, dedicated rack mount servers, desktop computers, laptop computers, set-top boxes, tablets, netbooks, smartphones, wearable devices, It may include integrated devices that combine two or more features, similar or any combination thereof. Signal packets and / or frames may be exchanged, for example, between server and client devices, and / or other types of network devices, including between wireless devices coupled via a wireless network. Note that the terms server, server device, server computing device, server computing platform, and / or similar terms may be used interchangeably. Similarly, the terms client, client device, client computing device, client computing platform, and / or similar terms can also be used interchangeably. In some cases, for ease of explanation, these terms may be used in the singular by being referred to as “client devices” or “server devices” or the like, but this expression may be It is intended to include one or more client devices and / or one or more server devices. On similar lines, reference to “database” is understood to mean one or more databases and / or portions thereof, as appropriate.

  [0066] It should be understood that for ease of explanation, network devices (also referred to as networking devices) may be embodied and / or described in terms of computing devices. This description should not, however, be construed as limiting the subject matter recited in the claims to one embodiment such as a computing device and / or a network device; rather, for example, one or more It should be further understood that various devices or combinations thereof may be implemented, including illustrative examples of:

  [0067] References throughout this specification to an implementation, an implementation, an embodiment, an embodiment, and / or the like are described in the context of a particular implementation and / or embodiment. It is meant that a particular feature, structure, and / or characteristic is included in at least one implementation and / or embodiment of the subject matter recited in the claims. Thus, for example, the appearance of such phrases in various places throughout this specification is not necessarily intended to refer to the same implementation, or any one particular implementation described. Furthermore, the particular features, structures, and / or characteristics described may be combined in various ways in one or more implementations, and thus, for example, within the scope of the intended claims It will be understood that there is. Of course, in general, these and other challenges vary in context. Thus, the specific context of explanation and / or use provides a convenient indicator of the inference drawn.

[0068] While what is presently considered to be exemplary features are illustrated and described, various other modifications can be made and equivalents without departing from the subject matter recited in the claims. It will be appreciated by those skilled in the art that things can be substituted. In addition, many modifications may be made to adapt a particular situation to the teachings of subject matter described in the claims without departing from the central concepts described herein. Accordingly, the subject matter recited in the claims is not limited to the specific example disclosed, but such subject matter as described in the claims is appended to the appended claims and their equivalents. It is intended that all embodiments falling within the scope of
The invention described in the scope of claims at the beginning of the application of the present application will be added below.
[C1]
A method for background signal tracking in a mobile device comprising:
Obtaining one or more observations of one or more terrestrial signals;
Storing the one or more observations in a local memory;
Retrieving the one or more stored observations for use at least in part to capture one or more reference signals in response to an emergency event;
Determining a position fix of the mobile device based at least in part on the one or more stored observations;
A method comprising:
[C2]
The one or more stored observations include a measured arrival time (TOA) of the one or more terrestrial signals, a measured arrival time difference (TDOA) of the one or more terrestrial signals, the 1 The method of C1, comprising at least one of an identity of a terrestrial transmitter transmitting one or more terrestrial signals, or any combination thereof.
[C4]
The method of C1, wherein the emergency event indicates the emergency event and is detected via a message received at the mobile device.
[C5]
The method of C1, further comprising narrowing a search window for the acquisition of the one or more reference signals.
[C6]
The narrowing of the search window for the acquisition of the one or more reference signals is an expected uncertainty parameter received at the mobile device and provided in a message indicating the emergency event. The method of C5, further comprising narrowing a search window size.
[C7]
The method of C6, wherein the message received at the mobile device and indicating the emergency event comprises an LTE positioning protocol message communicated in response to detection of the emergency event at an emergency response authority (PSAP).
[C8]
The method of C1, further comprising detecting a true early arrival path (EAP) for the acquisition of the one or more reference signals.
[C9]
The one or more terrestrial signals include one or more positioning reference signals (PRS) in long term evolution (LTE), one or more cell specific reference signals (CRS) in long term evolution (LTE), and code division multiples. At least one of one or more 1x signals for connection (CDMA), one or more satellite positioning system (SPS) signals, one or more wireless wide area network (WWAN) signals, or any combination thereof The method of C1, comprising.
[C10]
The method of C1, wherein the one or more observations are obtained independently of the emergency event.
[C11]
The method of C1, further comprising enhancing the one or more observations with sensor data for use at least in part for capturing the one or more reference signals.
[C12]
The one or more reference signals may be transmitted via at least one of an observed time difference of arrival (OTDOA) positioning technique, an advanced forward link trilateral surveying (AFLT) positioning technique, an SPS positioning technique, or any combination thereof. The method of C1, wherein the method is captured.
[C13]
The method of C1, wherein the emergency event comprises a 911 call originating from the mobile device.
[C14]
The acquisition of the one or more reference signals is at least acquisition of one or more measurements of the TOA of the one or more reference signals, or one or more measurements of the TDOA of the one or more reference signals. The method of C1, comprising.
[C15]
The method of C1, further comprising filtering one or more measurements of TOA or TDOA of one or more reference signals after the message indicating the emergency event.
[C16]
The method of C1, wherein the one or more reference signals are captured in a Global Navigation Satellite System (GNSS) rejection environment.
[C17]
The method of C1, further comprising detecting an expected multipath for the acquisition of the one or more reference signals.
[C18]
A device for background signal tracking,
Means for obtaining one or more observations of one or more terrestrial signals;
Means for storing the one or more observations in a local memory;
Means for retrieving the one or more stored observations for use at least in part to capture one or more reference signals in response to an emergency event;
Means for determining a position fix of a mobile device based at least in part on the one or more stored observations;
An apparatus comprising:
[C19]
The apparatus of C18, further comprising means for narrowing a search window for the acquisition of the one or more reference signals.
[C20]
The apparatus of C18, further comprising means for detecting a true early arrival path (EAP) for the acquisition of the one or more reference signals.
[C21]
A device for background signal tracking,
A wireless transceiver for communicating with an electronic communication network; and
Obtain one or more observations of one or more terrestrial signals
Configured to do
One or more processors coupled to a memory and the wireless transceiver; and the one or more processors,
Storing the one or more observations in a local memory;
Retrieving the one or more stored observations for use at least in part to capture one or more reference signals in response to an emergency event;
Determining a position fix of the mobile device based at least in part on the one or more stored observations;
Configured to do the
An apparatus comprising:
[C22]
The one or more stored observations include a measured arrival time (TOA) of the one or more terrestrial signals, a measured arrival time difference (TDOA) of the one or more terrestrial signals, the 1 The apparatus of C21, comprising at least one of an identity of a terrestrial transmitter that transmits one or more terrestrial signals, or any combination thereof.
[C23]
The apparatus of C21, wherein the one or more processors facilitates narrowing a search window for the acquisition of the one or more reference signals.
[C24]
The apparatus of C21, wherein the one or more processors facilitates detecting a true early arrival path (EAP) for the acquisition of the one or more reference signals.
[C25]
The apparatus of C21, wherein the emergency event is detected via a message received at the mobile device.
[C26]
The one or more terrestrial signals include one or more positioning reference signals (PRS) in long term evolution (LTE), one or more cell specific reference signals (CRS) in long term evolution (LTE), and code division multiples. At least one of one or more 1x signals for connection (CDMA), one or more satellite positioning system (SPS) signals, one or more wireless wide area network (WWAN) signals, or any combination thereof The apparatus according to C21, comprising:
[C27]
The one or more reference signals may be transmitted via at least one of an observed time difference of arrival (OTDOA) positioning technique, an advanced forward link trilateral surveying (AFLT) positioning technique, an SPS positioning technique, or any combination thereof. The device according to C21, which is to be captured.
[C28]
The apparatus of C21, wherein the one or more observation results are obtained independently of the emergency event.
[C29]
The apparatus of C21, wherein the one or more processors facilitates filtering one or more measurements of TOA or TDOA of one or more reference signals after the emergency event.
[C30]
A non-transitory storage medium having instructions executable by a processor, the instructions obtaining one or more observations of one or more terrestrial signals;
Storing the one or more observations in a local memory;
Retrieving the one or more stored observations for use at least in part to capture one or more reference signals in response to an emergency event;
Determining a position fix of the mobile device based at least in part on the one or more stored observations;
A non-temporary storage medium.

Claims (25)

A method for background signal tracking in a mobile device comprising:
Obtaining one or more observations of one or more terrestrial signals by decoding one or more signal parameters using a processor;
Storing the one or more observations in a local memory of the mobile device;
By accessing the local memory of the mobile device and in response to an emergency event, at least in part, the size of the search window for the uncertainty parameter expected for acquisition of one or more reference signals Retrieving the one or more stored observations for use in narrowing and the expected uncertainty parameter is received at the mobile device and provided in a message indicating the emergency event; The
Calculating by the processor a position fix of the mobile device based at least in part on the one or more retrieved observations ;
The method further comprises narrowing the size of the search window for the acquisition of the one or more reference signals .   The one or more stored observations include a measured arrival time (TOA) of the one or more terrestrial signals, a measured arrival time difference (TDOA) of the one or more terrestrial signals, the 1 The method of claim 1, comprising at least one of an identity of a terrestrial transmitter that transmits one or more terrestrial signals, or any combination thereof.   The method of claim 1, wherein the emergency event is received at the mobile device and detected via the message indicating the emergency event.   The method of claim 1, wherein the message received at the mobile device and indicating the emergency event comprises an LTE positioning protocol message communicated in response to detection of the emergency event at an emergency response authority (PSAP). .   The method of claim 1, further comprising detecting a true early arrival path (EAP) for the acquisition of the one or more reference signals.   The one or more terrestrial signals include one or more positioning reference signals (PRS) in long term evolution (LTE), one or more cell specific reference signals (CRS) in long term evolution (LTE), and code division multiples. At least one of one or more 1x signals for connection (CDMA), one or more satellite positioning system (SPS) signals, one or more wireless wide area network (WWAN) signals, or any combination thereof The method of claim 1, comprising:   The method of claim 1, wherein the one or more observations are obtained independently of the emergency event.   The method of claim 1, further comprising augmenting the one or more observations with sensor data for use at least in part for capturing the one or more reference signals.   The one or more reference signals may be transmitted via at least one of an observed time difference of arrival (OTDOA) positioning technique, an advanced forward link triangulation (AFLT) positioning technique, an SPS positioning technique, or any combination thereof. The method of claim 1, wherein the method is captured.   The method of claim 1, wherein the emergency event comprises a 911 call originating from the mobile device.   The acquisition of the one or more reference signals is at least acquisition of one or more measurements of the TOA of the one or more reference signals, or one or more measurements of the TDOA of the one or more reference signals. The method of claim 1, comprising:   The method of claim 1, further comprising filtering one or more measurements of one or more reference signals TOA or TDOA after the message received at the mobile device and indicating the emergency event. Method.   The method of claim 1, wherein the one or more reference signals are captured in a Global Navigation Satellite System (GNSS) rejection environment.   The method of claim 1, further comprising detecting an expected multipath for the acquisition of the one or more reference signals. A device for background signal tracking,
Means for obtaining one or more observations of one or more terrestrial signals by decoding one or more signal parameters using a processor;
Means for storing the one or more observations in a local memory of a mobile device;
By accessing the local memory of the mobile device and in response to an emergency event, at least in part, the size of the search window for the uncertainty parameter expected for acquisition of one or more reference signals Means for retrieving the one or more stored observations for use in narrowing and the expected uncertainty parameter are received in the mobile device and in a message indicating the emergency event Provided,
Means for calculating a position fix of a mobile device based at least in part on the one or more retrieved observations by the processor ;
An apparatus further comprising means for narrowing the size of the search window for the acquisition of the one or more reference signals . The apparatus of claim 15 , further comprising means for detecting a true early arrival path (EAP) for the acquisition of the one or more reference signals. A device for background signal tracking,
A wireless transceiver for communicating with an electronic communication network; and
Configured to obtain one or more observations of one or more terrestrial signals by decoding one or more signal parameters using one or more processors;
The one or more processors coupled to a memory and the wireless transceiver;
With
The one or more processors are:
Storing the one or more observations in a local memory of a mobile device;
By accessing the local memory of the mobile device and in response to an emergency event, at least in part, the size of the search window for the uncertainty parameter expected for acquisition of one or more reference signals Retrieving the one or more stored observations for use in narrowing and the expected uncertainty parameter is received at the mobile device and provided in a message indicating the emergency event; The
Calculating, by the one or more processors, a position fix of a mobile device based at least in part on the one or more retrieved observations ;
The one or more processors is further for narrowing the size of the search window for the acquisition of the one or more reference signals . The one or more stored observations include a measured arrival time (TOA) of the one or more terrestrial signals, a measured arrival time difference (TDOA) of the one or more terrestrial signals, the 1 18. The apparatus of claim 17 , comprising at least one of an identity of a terrestrial transmitter that transmits one or more terrestrial signals, or any combination thereof. The apparatus of claim 17 , wherein the one or more processors are further for detecting a true early arrival path (EAP) for the acquisition of the one or more reference signals. The apparatus of claim 17 , wherein the emergency event is detected via the message received at the mobile device. The one or more terrestrial signals include one or more positioning reference signals (PRS) in long term evolution (LTE), one or more cell specific reference signals (CRS) in long term evolution (LTE), and code division multiples. At least one of one or more 1x signals for connection (CDMA), one or more satellite positioning system (SPS) signals, one or more wireless wide area network (WWAN) signals, or any combination thereof The apparatus of claim 17 , comprising: The one or more reference signals may be transmitted via at least one of an observation time difference of arrival (OTDOA) positioning technique, an advanced forward link triangulation (AFLT) positioning technique, an SPS positioning technique, or any combination thereof. The device of claim 17 , which is to be captured. The apparatus of claim 17 , wherein the one or more observations are obtained independently of the emergency event. The apparatus of claim 17 , wherein the one or more processors are further for filtering one or more measurements of one or more reference signals TOA or TDOA after the emergency event. A non-transitory storage medium having instructions executable by a processor, the instructions comprising:
Obtaining one or more observations of one or more terrestrial signals by decoding one or more signal parameters using the processor;
Storing the one or more observations in a local memory of a mobile device;
By accessing the local memory of the mobile device and in response to an emergency event, at least in part, the size of the search window for the uncertainty parameter expected for acquisition of one or more reference signals Retrieving the one or more stored observations for use in narrowing and the expected uncertainty parameter is received at the mobile device and provided in a message indicating the emergency event; The
By said processor, based at least in part on the one or more retrieved observations, have rows and calculating a position fix of the mobile device,
The instructions are further non-transitory storage media executable by the processor to narrow the size of the search window for the acquisition of the one or more reference signals .

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